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Bad metallic transport in a cold atom Fermi-Hubbard system

Author(s): Brown, Peter T; Mitra, Debayan; Guardado-Sanchez, Elmer; Nourafkan, Reza; Reymbaut, Alexis; et al

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dc.contributor.authorBrown, Peter T-
dc.contributor.authorMitra, Debayan-
dc.contributor.authorGuardado-Sanchez, Elmer-
dc.contributor.authorNourafkan, Reza-
dc.contributor.authorReymbaut, Alexis-
dc.contributor.authorHebert, Charles-David-
dc.contributor.authorBergeron, Simon-
dc.contributor.authorTremblay, A-MS-
dc.contributor.authorKokalj, Jure-
dc.contributor.authorHuse, David A-
dc.contributor.authorSchauss, Peter-
dc.contributor.authorBakr, Waseem S-
dc.identifier.citationBrown, Peter T, Mitra, Debayan, Guardado-Sanchez, Elmer, Nourafkan, Reza, Reymbaut, Alexis, Hebert, Charles-David, Bergeron, Simon, Tremblay, A-MS, Kokalj, Jure, Huse, David A, Schauss, Peter, Bakr, Waseem S. (2019). Bad metallic transport in a cold atom Fermi-Hubbard system. SCIENCE, 363 (379 - 382. doi:10.1126/science.aat4134en_US
dc.description.abstractStrong interactions in many-body quantum systems complicate the interpretation of charge transport in such materials. To shed light on this problem, we study transport in a clean quantum system: ultracold lithium-6 in a two-dimensional optical lattice, a testing ground for strong interaction physics in the Fermi-Hubbard model. We determine the diffusion constant by measuring the relaxation of an imposed density modulation and modeling its decay hydrodynamically. The diffusion constant is converted to a resistivity by using the Nernst-Einstein relation. That resistivity exhibits a linear temperature dependence and shows no evidence of saturation, two characteristic signatures of a bad metal. The techniques we developed in this study may be applied to measurements of other transport quantities, including the optical conductivity and thermopower.en_US
dc.format.extent379 - 382en_US
dc.rightsAuthor's manuscripten_US
dc.titleBad metallic transport in a cold atom Fermi-Hubbard systemen_US
dc.typeJournal Articleen_US

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